--- /dev/null
+/*************************************************************************
+ * *
+ * Open Dynamics Engine, Copyright (C) 2001-2003 Russell L. Smith. *
+ * All rights reserved. Email: russ@q12.org Web: www.q12.org *
+ * *
+ * This library is free software; you can redistribute it and/or *
+ * modify it under the terms of EITHER: *
+ * (1) The GNU Lesser General Public License as published by the Free *
+ * Software Foundation; either version 2.1 of the License, or (at *
+ * your option) any later version. The text of the GNU Lesser *
+ * General Public License is included with this library in the *
+ * file LICENSE.TXT. *
+ * (2) The BSD-style license that is included with this library in *
+ * the file LICENSE-BSD.TXT. *
+ * *
+ * This library is distributed in the hope that it will be useful, *
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of *
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the files *
+ * LICENSE.TXT and LICENSE-BSD.TXT for more details. *
+ * *
+ *************************************************************************/
+
+/*
+ * TriMesh code by Erwin de Vries.
+ *
+ * Trimesh data.
+ * This is where the actual vertexdata (pointers), and BV tree is stored.
+ * Vertices should be single precision!
+ * This should be more sophisticated, so that the user can easyly implement
+ * another collision library, but this is a lot of work, and also costs some
+ * performance because some data has to be copied.
+ */
+
+#ifndef _ODE_COLLISION_TRIMESH_H_
+#define _ODE_COLLISION_TRIMESH_H_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/*
+ * Data storage for triangle meshes.
+ */
+struct dxTriMeshData;
+typedef struct dxTriMeshData* dTriMeshDataID;
+
+
+typedef enum
+{
+ dMTV__MIN,
+
+ dMTV_FIRST = dMTV__MIN,
+ dMTV_SECOND,
+ dMTV_THIRD,
+
+ dMTV__MAX,
+
+} dMeshTriangleVertex;
+
+/*
+ * These don't make much sense now, but they will later when we add more
+ * features.
+ */
+ODE_API dTriMeshDataID dGeomTriMeshDataCreate(void);
+ODE_API void dGeomTriMeshDataDestroy(dTriMeshDataID g);
+
+
+/*
+ * The values of data_id that can be used with dGeomTriMeshDataSet/dGeomTriMeshDataGet
+ */
+enum
+{
+ dTRIMESHDATA__MIN,
+
+ dTRIMESHDATA_FACE_NORMALS = dTRIMESHDATA__MIN,
+ dTRIMESHDATA_USE_FLAGS,
+
+ dTRIMESHDATA__MAX,
+
+#ifndef TRIMESH_FACE_NORMALS // Define this name during the header inclusion if you need it for something else
+ // Included for backward compatibility -- please use the corrected name above. Sorry.
+ TRIMESH_FACE_NORMALS = dTRIMESHDATA_FACE_NORMALS,
+#endif
+};
+
+/*
+ * The flags of the dTRIMESHDATA_USE_FLAGS data elements
+ */
+enum
+{
+ dMESHDATAUSE_EDGE1 = 0x01,
+ dMESHDATAUSE_EDGE2 = 0x02,
+ dMESHDATAUSE_EDGE3 = 0x04,
+ dMESHDATAUSE_VERTEX1 = 0x08,
+ dMESHDATAUSE_VERTEX2 = 0x10,
+ dMESHDATAUSE_VERTEX3 = 0x20,
+};
+
+/*
+ * Set and get the TriMeshData additional data
+ * Note: The data is NOT COPIED on assignment
+ */
+ODE_API void dGeomTriMeshDataSet(dTriMeshDataID g, int data_id, void *in_data);
+ODE_API void *dGeomTriMeshDataGet(dTriMeshDataID g, int data_id);
+ODE_API void *dGeomTriMeshDataGet2(dTriMeshDataID g, int data_id, dsizeint *pout_size/*=NULL*/);
+
+
+
+/**
+ * We need to set the last transform after each time step for
+ * accurate collision response. These functions get and set that transform.
+ * It is stored per geom instance, rather than per dTriMeshDataID.
+ */
+ODE_API void dGeomTriMeshSetLastTransform( dGeomID g, const dMatrix4 last_trans );
+ODE_API const dReal* dGeomTriMeshGetLastTransform( dGeomID g );
+
+/*
+ * Build a TriMesh data object with single precision vertex data.
+ */
+ODE_API void dGeomTriMeshDataBuildSingle(dTriMeshDataID g,
+ const void* Vertices, int VertexStride, int VertexCount,
+ const void* Indices, int IndexCount, int TriStride);
+/* same again with a normals array (used as trimesh-trimesh optimization) */
+ODE_API void dGeomTriMeshDataBuildSingle1(dTriMeshDataID g,
+ const void* Vertices, int VertexStride, int VertexCount,
+ const void* Indices, int IndexCount, int TriStride,
+ const void* Normals);
+/*
+* Build a TriMesh data object with double precision vertex data.
+*/
+ODE_API void dGeomTriMeshDataBuildDouble(dTriMeshDataID g,
+ const void* Vertices, int VertexStride, int VertexCount,
+ const void* Indices, int IndexCount, int TriStride);
+/* same again with a normals array (used as trimesh-trimesh optimization) */
+ODE_API void dGeomTriMeshDataBuildDouble1(dTriMeshDataID g,
+ const void* Vertices, int VertexStride, int VertexCount,
+ const void* Indices, int IndexCount, int TriStride,
+ const void* Normals);
+
+/*
+ * Simple build. Single/double precision based on dSINGLE/dDOUBLE!
+ */
+ODE_API void dGeomTriMeshDataBuildSimple(dTriMeshDataID g,
+ const dReal* Vertices, int VertexCount,
+ const dTriIndex* Indices, int IndexCount);
+/* same again with a normals array (used as trimesh-trimesh optimization) */
+ODE_API void dGeomTriMeshDataBuildSimple1(dTriMeshDataID g,
+ const dReal* Vertices, int VertexCount,
+ const dTriIndex* Indices, int IndexCount,
+ const int* Normals);
+
+
+/*
+ * Data preprocessing build request flags.
+ */
+enum
+{
+ dTRIDATAPREPROCESS_BUILD__MIN,
+
+ dTRIDATAPREPROCESS_BUILD_CONCAVE_EDGES = dTRIDATAPREPROCESS_BUILD__MIN, // Used to optimize OPCODE trimesh-capsule collisions; allocates 1 byte per triangle; no extra data associated
+ dTRIDATAPREPROCESS_BUILD_FACE_ANGLES, // Used to aid trimesh-convex collisions; memory requirements depend on extra data
+
+ dTRIDATAPREPROCESS_BUILD__MAX,
+};
+
+/*
+ * Data preprocessing extra values for dTRIDATAPREPROCESS_BUILD_FACE_ANGLES.
+ */
+enum
+{
+ dTRIDATAPREPROCESS_FACE_ANGLES_EXTRA__MIN,
+
+ dTRIDATAPREPROCESS_FACE_ANGLES_EXTRA_BYTE_POSITIVE = dTRIDATAPREPROCESS_FACE_ANGLES_EXTRA__MIN, // Build angles for convex edges only and store as bytes; allocates 3 bytes per triangle; stores angles (0..180] in 1/254 fractions leaving two values for the flat and all the concaves
+ dTRIDATAPREPROCESS_FACE_ANGLES_EXTRA_BYTE_ALL, // Build angles for all the edges and store in bytes; allocates 3 bytes per triangle; stores angles [-180..0) and (0..180] in 1/127 fractions plus a value for the flat angle
+ dTRIDATAPREPROCESS_FACE_ANGLES_EXTRA_WORD_ALL, // Build angles for all the edges and store in words; allocates 6 bytes per triangle; stores angles [-180..0) and (0..180] in 1/32767 fractions plus a value for the flat angle
+
+ dTRIDATAPREPROCESS_FACE_ANGLES_EXTRA__MAX,
+
+ dTRIDATAPREPROCESS_FACE_ANGLES_EXTRA__DEFAULT = dTRIDATAPREPROCESS_FACE_ANGLES_EXTRA_BYTE_POSITIVE, // The default value assumed if the extra data is not provided
+};
+
+
+/*
+ * Pre-process the trimesh data according to the request flags.
+ *
+ * buildRequestFlags is a bitmask of 1U << dTRIDATAPREPROCESS_BUILD_...
+ * It is allowed to call the function multiple times provided the bitmasks are different each time.
+ *
+ * requestExtraData is an optional pointer to array of extra parameters per bitmask bits
+ * (only the elements indexed by positions of raised bits are examined;
+ * defaults are assumed if the pointer is NULL)
+ *
+ * The function returns a boolean status the only failure reason being insufficient memory.
+ */
+ODE_API int dGeomTriMeshDataPreprocess2(dTriMeshDataID g, unsigned int buildRequestFlags, const dintptr *requestExtraData/*=NULL | const dintptr (*)[dTRIDATAPREPROCESS_BUILD__MAX]*/);
+
+/*
+ * Obsolete. Equivalent to calling dGeomTriMeshDataPreprocess2(g, (1U << dTRIDATAPREPROCESS_BUILD_CONCAVE_EDGES), NULL)
+ */
+ODE_API int dGeomTriMeshDataPreprocess(dTriMeshDataID g);
+
+
+
+/*
+ * Get and set the internal preprocessed trimesh data buffer (see the enumerated type above), for loading and saving
+ * These functions are deprecated. Use dGeomTriMeshDataSet/dGeomTriMeshDataGet2 with dTRIMESHDATA_USE_FLAGS instead.
+ */
+ODE_API_DEPRECATED ODE_API void dGeomTriMeshDataGetBuffer(dTriMeshDataID g, unsigned char** buf, int* bufLen);
+ODE_API_DEPRECATED ODE_API void dGeomTriMeshDataSetBuffer(dTriMeshDataID g, unsigned char* buf);
+
+
+/*
+ * Per triangle callback. Allows the user to say if he wants a collision with
+ * a particular triangle.
+ */
+typedef int dTriCallback(dGeomID TriMesh, dGeomID RefObject, int TriangleIndex);
+ODE_API void dGeomTriMeshSetCallback(dGeomID g, dTriCallback* Callback);
+ODE_API dTriCallback* dGeomTriMeshGetCallback(dGeomID g);
+
+/*
+ * Per object callback. Allows the user to get the list of triangles in 1
+ * shot. Maybe we should remove this one.
+ */
+typedef void dTriArrayCallback(dGeomID TriMesh, dGeomID RefObject, const int* TriIndices, int TriCount);
+ODE_API void dGeomTriMeshSetArrayCallback(dGeomID g, dTriArrayCallback* ArrayCallback);
+ODE_API dTriArrayCallback* dGeomTriMeshGetArrayCallback(dGeomID g);
+
+/*
+ * Ray callback.
+ * Allows the user to say if a ray collides with a triangle on barycentric
+ * coords. The user can for example sample a texture with alpha transparency
+ * to determine if a collision should occur.
+ */
+typedef int dTriRayCallback(dGeomID TriMesh, dGeomID Ray, int TriangleIndex, dReal u, dReal v);
+ODE_API void dGeomTriMeshSetRayCallback(dGeomID g, dTriRayCallback* Callback);
+ODE_API dTriRayCallback* dGeomTriMeshGetRayCallback(dGeomID g);
+
+/*
+ * Triangle merging callback.
+ * Allows the user to generate a fake triangle index for a new contact generated
+ * from merging of two other contacts. That index could later be used by the
+ * user to determine attributes of original triangles used as sources for a
+ * merged contact.
+ */
+typedef int dTriTriMergeCallback(dGeomID TriMesh, int FirstTriangleIndex, int SecondTriangleIndex);
+ODE_API void dGeomTriMeshSetTriMergeCallback(dGeomID g, dTriTriMergeCallback* Callback);
+ODE_API dTriTriMergeCallback* dGeomTriMeshGetTriMergeCallback(dGeomID g);
+
+/*
+ * Trimesh class
+ * Construction. Callbacks are optional.
+ */
+ODE_API dGeomID dCreateTriMesh(dSpaceID space, dTriMeshDataID Data, dTriCallback* Callback, dTriArrayCallback* ArrayCallback, dTriRayCallback* RayCallback);
+
+ODE_API void dGeomTriMeshSetData(dGeomID g, dTriMeshDataID Data);
+ODE_API dTriMeshDataID dGeomTriMeshGetData(dGeomID g);
+
+
+/* enable/disable/check temporal coherence*/
+ODE_API void dGeomTriMeshEnableTC(dGeomID g, int geomClass, int enable);
+ODE_API int dGeomTriMeshIsTCEnabled(dGeomID g, int geomClass);
+
+/*
+ * Clears the internal temporal coherence caches. When a geom has its
+ * collision checked with a trimesh once, data is stored inside the trimesh.
+ * With large worlds with lots of seperate objects this list could get huge.
+ * We should be able to do this automagically.
+ */
+ODE_API void dGeomTriMeshClearTCCache(dGeomID g);
+
+
+/*
+ * returns the TriMeshDataID
+ */
+ODE_API dTriMeshDataID dGeomTriMeshGetTriMeshDataID(dGeomID g);
+
+/*
+ * Gets a triangle.
+ */
+ODE_API void dGeomTriMeshGetTriangle(dGeomID g, int Index, dVector3* v0, dVector3* v1, dVector3* v2);
+
+/*
+ * Gets the point on the requested triangle and the given barycentric
+ * coordinates.
+ */
+ODE_API void dGeomTriMeshGetPoint(dGeomID g, int Index, dReal u, dReal v, dVector3 Out);
+
+/*
+
+This is how the strided data works:
+
+struct StridedVertex{
+ dVector3 Vertex;
+ // Userdata
+};
+int VertexStride = sizeof(StridedVertex);
+
+struct StridedTri{
+ int Indices[3];
+ // Userdata
+};
+int TriStride = sizeof(StridedTri);
+
+*/
+
+
+ODE_API int dGeomTriMeshGetTriangleCount (dGeomID g);
+
+ODE_API void dGeomTriMeshDataUpdate(dTriMeshDataID g);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _ODE_COLLISION_TRIMESH_H_ */
+
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